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|
package main
import (
"fmt"
"go/ast"
"go/importer"
"go/parser"
"go/token"
"go/types"
"log"
"os"
)
func IsBasicGoType(t types.Type, flag types.BasicInfo) bool {
switch u := t.(type) {
case *types.Basic:
if u.Info()&flag != 0 {
return true
}
return false
case *types.Named:
return IsBasicGoType(u.Underlying(), flag)
}
return false
}
func GoToVarlinkType(t types.Type) string {
if IsBasicGoType(t, types.IsBoolean) {
return "bool"
}
if IsBasicGoType(t, types.IsInteger) {
return "int"
}
if IsBasicGoType(t, types.IsFloat) {
return "float"
}
if IsBasicGoType(t, types.IsString) {
return "string"
}
switch u := t.(type) {
case *types.Basic:
return fmt.Sprintf("<<<%s>>>", t.String())
case *types.Named:
return u.Obj().Name()
case *types.Map:
if IsBasicGoType(u.Key(), types.IsString) {
return fmt.Sprintf("[string]%s", GoToVarlinkType(u.Elem()))
} else {
return fmt.Sprintf("<<<%s>>>", u.String())
}
case *types.Interface:
if u.Empty() {
return "()"
}
return fmt.Sprintf("<<<%s>>>", u.String())
case *types.Pointer:
return fmt.Sprintf("?%s", GoToVarlinkType(u.Elem()))
case *types.Array:
return fmt.Sprintf("[]%s", GoToVarlinkType(u.Elem()))
case *types.Slice:
return fmt.Sprintf("[]%s", GoToVarlinkType(u.Elem()))
case *types.Struct:
if u.NumFields() > 0 {
s := ""
for i := 0; i < u.NumFields(); i++ {
if i > 0 {
s += ",\n"
}
s += fmt.Sprintf("\t%s: %s",
u.Field(i).Name(), GoToVarlinkType(u.Field(i).Type()))
}
return fmt.Sprintf("(\n%s\n)", s)
}
return "()"
default:
return fmt.Sprintf("<<<%T %s>>>", t, u)
}
}
func PrintDefsUses(name string, fset *token.FileSet, files []*ast.File) error {
conf := types.Config{
Importer: importer.Default(),
FakeImportC: true,
}
info := &types.Info{
Defs: make(map[*ast.Ident]types.Object),
}
_, err := conf.Check(name, fset, files, info)
if err != nil {
return err // type error
}
seen := map[string]interface{}{}
for id, obj := range info.Defs {
if obj == nil {
continue
}
if _, ok := seen[id.Name]; ok {
continue
}
/*
if !obj.Exported() || obj.Pkg().Name() != name {
continue
}
*/
switch f := obj.Type().Underlying().(type) {
case *types.Struct:
if f.NumFields() > 0 {
fmt.Printf("type %s %s\n\n", id.Name, GoToVarlinkType(f))
}
}
seen[id.Name] = nil
}
return nil
}
func main() {
path := os.Args[1]
fs := token.NewFileSet()
if stat, err := os.Stat(path); err == nil && stat.IsDir() {
pkgs, err := parser.ParseDir(fs, path, nil, 0)
if err != nil {
fmt.Printf("parsing dir '%s': %s", path, err)
}
for name, pkg := range pkgs {
log.Println("Found package:", name)
fset := make([]*ast.File, len(pkg.Files), len(pkg.Files))
idx := 0
for _, value := range pkg.Files {
fset[idx] = value
idx++
}
if err := PrintDefsUses(name, fs, fset); err != nil {
log.Print(err) // type error
}
}
} else {
fset, err := parser.ParseFile(fs, path, nil, 0)
if err != nil {
fmt.Printf("parsing file '%s': %s", path, err)
}
name := fset.Name.String()
if err := PrintDefsUses(name, fs, []*ast.File{fset}); err != nil {
log.Print(err) // type error
}
}
}
|
